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Increasing voltage on AMD Phenom ii x4 965BE causing computer to freeze

post #1 of 11
Thread Starter 
Hey, I've browsed and used these forums for research a long time ago, but kind of gave up on overclocking, but now as my systems does not perform as well as it used to with new programs I've returned to trying to overclock. Except I have one issue that I am kind of thinking is related to the CPU power my motherboard handles.
First of here is my specs :
AMD Phenom ii x4 965 BE
G.Skill Snipers 1600 CL9 1.5v 8GB
MSI N560 GTX Twin Frozr I
Corsair GS800 800w PSU
ASRock 970 extreme3

So here is my problem. I managed to get my CPU from 3.4GHz to 4.2GHz, and to do this I had to up my voltage to 1.4250v and I have been trying to reach 4.4GHz, problem is when I got to 4.3 I need more voltage for it to be stable, but as soon as I go 1.4375 or above my computer will freeze after a little while of being on. No matter what I put my clock to if it goes 1.4375v or more it does freeze, and the higher I go the quicker it freezes. I do have a NB overclock but this happens all the same with or without that.
I know my 4.2GHz OC is stable as it survives 24hours of P95
I'm wondering if this is a motherboard issue? Is the OC increasing the power draw to something the Motherboard can't handle. I'm suspicious of this as the motherboard can handle 140w CPU, where my CPU is 125w, is the OC upping this past what the motherboard can handle?
post #2 of 11
Your CPU is overheating and shutting down. What cooling do you have? Stock?
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post #3 of 11
The ASRock 970 extreme3 is a 4+1 phase VRM motherboard. Don't expect any sort of stability over 1.4250V.
I've had an Athlon II x2 on 1.460V degrade after a few months on a Gigabyte 76LMT-USB3 (also 4+1 phase). Beware.

What i think happens is the voltage spikes when the CPU transitions between loaded and unloaded states. It happens way too fast to be detected by monitoring software, but the spikes will eventually kill your chip.

At this point I don't think it's worth getting a motherboard with better power phases.

What OS are you using?

It may be possible to set different clock speeds for each core using software. While this is mainly used for when you have one slower core (e.g. from unlocking a tri to a quad) it might still get a few MHz out of some cores.

Windows:
AMD Overdrive
K10Stat

Linux:
K10ctl
https://sourceforge.net/projects/k10ctl/

For Windows I don't know if it will work on 8 or later, since it was only made during Windows 7's time and later versions of Windows had changes to power management that stopped similar programs from working properly.

I have only used the Linux version.
Phenom II x3 B73 unlocked to x4 undervolted at 1.400V, cores 1-4 at 3.24, 3.36, 3.12, 3.12 GHz, respectively. The stock 1.425V was too much for it to handle.
Edited by ltpdttcdft - 10/17/17 at 10:45pm
UD7
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post #4 of 11
Thread Starter 
Quote:
Originally Posted by billbartuska View Post

Your CPU is overheating and shutting down. What cooling do you have? Stock?
I have Noctua NH-U14S which I thought was doing a good job, temps has never gone past 56°C with my overclock, even the overclocks where it freezes the temps don't pass 56, so I'm not sure if this is the case?

Quote:
Originally Posted by ltpdttcdft View Post

The ASRock 970 extreme3 is a 4+1 phase VRM motherboard. Don't expect any sort of stability over 1.4250V.
I've had an Athlon II x2 on 1.460V degrade after a few months on a Gigabyte 76LMT-USB3 (also 4+1 phase). Beware.

What i think happens is the voltage spikes when the CPU transitions between loaded and unloaded states. It happens way too fast to be detected by monitoring software, but the spikes will eventually kill your chip.

At this point I don't think it's worth getting a motherboard with better power phases.

What OS are you using?

It may be possible to set different clock speeds for each core using software. While this is mainly used for when you have one slower core (e.g. from unlocking a tri to a quad) it might still get a few MHz out of some cores.

Windows:
AMD Overdrive
K10Stat

Linux:
K10ctl
https://sourceforge.net/projects/k10ctl/

For Windows I don't know if it will work on 8 or later, since it was only made during Windows 7's time and later versions of Windows had changes to power management that stopped similar programs from working properly.

I have only used the Linux version.
Phenom II x3 B73 unlocked to x4 undervolted at 1.400V, cores 1-4 at 3.24, 3.36, 3.12, 3.12 GHz, respectively. The stock 1.425V was too much for it to handle.
I'm on windows 10 (regret changing from 7 tbh)
So you're saying it's the spike in voltage itself or that temp is spiking so quick that it's not being monitored?
I don't think it's temp, and as I'm relatively knew to overclocking I'm not sure what way the voltage spikes cause this to happen.
The safe voltage for this CPU I hear is 1.55v or below. I just thought as I was far of this it would be ok, but then I understand there is many other factors that I don't yet understand.

Thanks for the replies.
post #5 of 11
Quote:
Originally Posted by v0 HaVoK 0v View Post

I have Noctua NH-U14S which I thought was doing a good job, temps has never gone past 56°C with my overclock, even the overclocks where it freezes the temps don't pass 56, so I'm not sure if this is the case?
I'm on windows 10 (regret changing from 7 tbh)
So you're saying it's the spike in voltage itself or that temp is spiking so quick that it's not being monitored?
I don't think it's temp, and as I'm relatively knew to overclocking I'm not sure what way the voltage spikes cause this to happen.
The safe voltage for this CPU I hear is 1.55v or below. I just thought as I was far of this it would be ok, but then I understand there is many other factors that I don't yet understand.

Thanks for the replies.

Do you have a fan blowing on VRM heatsink?
Quote:
Originally Posted by ltpdttcdft View Post

I've had an Athlon II x2 on 1.460V degrade after a few months on a Gigabyte 76LMT-USB3 (also 4+1 phase). Beware.
Extreme LLC? Bad PSU?
post #6 of 11
Thread Starter 
Quote:
Originally Posted by 1216 View Post

Do you have a fan blowing on VRM heatsink?
By VRM do you mean the motherboard VRM?
If you do, no i don't have a fan blowing at it, also is there anyway of monitor the temps of the motherboard VRM?
BTW just making sure, the vrm on the motherboard is what the motherboards own little heatsinks are covering is it?
post #7 of 11
HWInfo will show you motherboard VRM temps. It'll also show you the actual voltage your CPU is running at. Those Phenoms have alot of VDroop under load, which means your 965 could be running well below 1.425V.



Also, 4.2 is a very respectable overclock, most chips don't go past 4.0 under air. 1.425V is also nothing to sneeze at... As others said, you're very likely at the limit of your motherboard.
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post #8 of 11
My 990 Extreme 3 has an incredibly heavy handed LLC feature. I"ve set the voltage to 1.53 to the core and it's boosted to 1.68 on a 965 . I'm betting yours is the same and that's just way too much v-boost. You might try different voltage/llc combos but I;m betting you are about at your limit anyhow.
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post #9 of 11
The voltage spike may or may not be accompanied by a heat spike. If your motherboard has a buzzer you might detect it by setting an alarm if CPU temperature exceeds 60C. If it beeps then for sure it is operating in an unhealthy condition as far as heat goes. If it does not beep then it still may or may not be quietly getting voltage spikes.
I remember somebody had a FX-9590 that suffered from heat spikes and degraded after a while.
Quote:
Originally Posted by 1216 View Post

Extreme LLC? Bad PSU?
Nope, Regular LLC. My motherboard only has regular and extreme, extreme gave it way too much voltage so I only use it on regular.
If the PSU was bad it would have killed my Phenom by now (the Athlon only lasted a few months).

60C on the core is considered safe. Keep it under 55C for 24/7 usage. If the NH-U14S keeps it under 56C while running Prime95 then I wouldn't immediately suspect the core temperature to be the culprit.

A fan over the VRM area is important to prevent your motherboard from literally burning out. The VRM is the part next to the the CPU with groups of identical structures lined up in a row. It's a common mistake to focus on cooling the CPU and forget to cool the VRM, then suffer the consequences.
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post #10 of 11
Thread Starter 

He guys, sorry for the late reply, was having this issue with my PC and couldn't figure it out, turns out the Sata port my HDD was plugged into stopped working. Swapped to a different port and setup in bios and it started working again.
Ok, back to overclocking,just downloading hwinfo now.
BTW I have another question as I was looking around inside my PC I noticed the little wire sensor was pulled out from the motherboard heatsink so I put it back. Here it is

I'm just wondering if this does anything for the temperature reading that are shown in these programs, or are they only for the temp monitor on the front of my case(which is what I think but I just need to make sure)
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